×
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Return Loss fail because of water leaching through cable jacket

Return Loss fail because of water leaching through cable jacket

Return Loss fail because of water leaching through cable jacket

(OP)
I have a situation using plenum systimax cat 6 used for furniture feeds that is stubbed into the deck of a building. There looks to be some water in the slab pipe. Head of pull was taped up and at least 15 feet was cut off. Upon termination noticed moisture inside cable jacket. Time from install to termination and testing <4hours. No damage to jacket pulling. All failed/marginal pass return loss test. 5 other dry pipe feeds in slab all passed clean. I know my correct fix but it would involve re-piping below terrazzo Should I be concerned about initial performance and over time?

RE: Return Loss fail because of water leaching through cable jacket

If there is water in the cable and you just pulled it, that cable is screwed
Repull with black, filled, Cat-6 and try again

RE: Return Loss fail because of water leaching through cable jacket

If there is a chance for water to infiltrate the pipes in the future, including the ones that were dry, then not just the ones that failed, but all the cables should be changed to a suitable water blocked type Cat 6 (there are some differences among products with regard to jacketing/water blocking) and it should be fire rated riser or plenum as appropriate to the entire run. If no future water infiltration can be expected, can the pipes be blown dry? If so, you can re-run with the same type as the original cable. Long term immersion in water is a death sentence for cables without an appropriate water block even if they initially work.

RE: Return Loss fail because of water leaching through cable jacket

If it's in slab you shouldn't use your everyday Cat 6 cable: it's not manufactured for that environment and I would be surprised if an Electrical Inspector would allow it! Use the correct cable for wet locations.

_________________________________
"Thank you for calling Technical Support. If you feel you have reached this number in error, please hang up and try again." ~Jane Barbe

RE: Return Loss fail because of water leaching through cable jacket

(OP)
Thanks all for confirming my fears. I will propose to customer to re-pull with outdoor rated and back charge EC for not using waterproof EMT fittings or rigid.

RE: Return Loss fail because of water leaching through cable jacket

"I will propose to customer to re-pull with outdoor rated and back charge EC for not using waterproof EMT fittings or rigid."

Can you prove the EC didn't? While the slab was poured but before the walls and ceiling were installed...exposed to the outdoor elements (rain, perhaps?).
Beside it doesn't sound like you installed the correct cable in the first place. Someone else shouldn't have to pay for your error.

_________________________________
"Thank you for calling Technical Support. If you feel you have reached this number in error, please hang up and try again." ~Jane Barbe

RE: Return Loss fail because of water leaching through cable jacket

Just be sure that whatever cable is pulled complies with electrical code fire/smoke rating requirements for your situation (i.e. dual outdoor/indoor rated riser or plenum as opposed to non-rated outdoor only cables).

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close